| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] in | 1596 |
|
| 2 | [vb past] [been] used | 310 |
|
| 3 | [been] used in | 281 |
|
| 4 | [vb past] used in | 25 |
|
